Commit 21a8122a authored by Alex Deucher's avatar Alex Deucher Committed by Dave Airlie
Browse files

drm/radeon/kms: add support for internal thermal sensors (v3) 



rv6xx/rv7xx/evergreen families supported; older asics did
not have an internal thermal sensor.

Note, not all oems use the internal thermal sensor, so it's
only exposed in cases where it is used.

Note also, that most laptops use an oem specific ACPI solution for
GPU thermal information rather than using the internal thermal
sensor directly.

v2: export millidegrees celsius, use hwmon device properly.
v3: fix Kconfig

Signed-off-by: default avatarAlex Deucher <alexdeucher@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent d7a2952f

drivers/gpu/drm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -61,6 +61,7 @@ config DRM_RADEON 
        select DRM_KMS_HELPER

        select DRM_TTM

	select POWER_SUPPLY

	select HWMON

	help

	  Choose this option if you have an ATI Radeon graphics card.  There

	  are both PCI and AGP versions.  You don't need to choose this to

drivers/gpu/drm/radeon/evergreen.c

+17 −0
Original line number Diff line number Diff line
@@ -39,6 +39,23 @@ 
static void evergreen_gpu_init(struct radeon_device *rdev);

void evergreen_fini(struct radeon_device *rdev);



/* get temperature in millidegrees */

u32 evergreen_get_temp(struct radeon_device *rdev)

{

	u32 temp = (RREG32(CG_MULT_THERMAL_STATUS) & ASIC_T_MASK) >>

		ASIC_T_SHIFT;

	u32 actual_temp = 0;



	if ((temp >> 10) & 1)

		actual_temp = 0;

	else if ((temp >> 9) & 1)

		actual_temp = 255;

	else

		actual_temp = (temp >> 1) & 0xff;



	return actual_temp * 1000;

}



void evergreen_pm_misc(struct radeon_device *rdev)

{

	int req_ps_idx = rdev->pm.requested_power_state_index;

drivers/gpu/drm/radeon/evergreend.h

+5 −0
Original line number Diff line number Diff line
@@ -165,6 +165,11 @@ 
#define		SE_DB_BUSY					(1 << 30)

#define		SE_CB_BUSY					(1 << 31)



#define	CG_MULT_THERMAL_STATUS				0x740

#define		ASIC_T(x)			        ((x) << 16)

#define		ASIC_T_MASK			        0x7FF0000

#define		ASIC_T_SHIFT			        16



#define	HDP_HOST_PATH_CNTL				0x2C00

#define	HDP_NONSURFACE_BASE				0x2C04

#define	HDP_NONSURFACE_INFO				0x2C08

drivers/gpu/drm/radeon/r600.c

+15 −0
Original line number Diff line number Diff line
@@ -92,6 +92,21 @@ void r600_gpu_init(struct radeon_device *rdev); 
void r600_fini(struct radeon_device *rdev);

void r600_irq_disable(struct radeon_device *rdev);



/* get temperature in millidegrees */

u32 rv6xx_get_temp(struct radeon_device *rdev)

{

	u32 temp = (RREG32(CG_THERMAL_STATUS) & ASIC_T_MASK) >>

		ASIC_T_SHIFT;

	u32 actual_temp = 0;



	if ((temp >> 7) & 1)

		actual_temp = 0;

	else

		actual_temp = (temp >> 1) & 0xff;



	return actual_temp * 1000;

}



void r600_pm_get_dynpm_state(struct radeon_device *rdev)

{

	int i;

drivers/gpu/drm/radeon/r600d.h

+5 −0
Original line number Diff line number Diff line
@@ -239,6 +239,11 @@ 
#define	GRBM_SOFT_RESET					0x8020

#define		SOFT_RESET_CP					(1<<0)



#define	CG_THERMAL_STATUS				0x7F4

#define		ASIC_T(x)			        ((x) << 0)

#define		ASIC_T_MASK			        0x1FF

#define		ASIC_T_SHIFT			        0



#define	HDP_HOST_PATH_CNTL				0x2C00

#define	HDP_NONSURFACE_BASE				0x2C04

#define	HDP_NONSURFACE_INFO				0x2C08

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